Special Events & Permits in Washington County, OR (2026)

2 county-level rules, plus city-specific rules for 2 cities in Washington County, Oregon.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Washington County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Park Event Permits

Large open-air events in unincorporated Washington County, over 3,000 people, lasting more than 24 but less than 120 consecutive hours, need an Outdoor Mass Gathering permit filed at least 140 days ahead, with a cost-recovery fee and a public hearing before the board.

Washington County Outdoor Mass Gathering Permit

Significant Restrictions

Washington County Code §§ 8.52.020.A and 8.52.010.I

A.No organizer shall hold, conduct, advertise or otherwise promote an outdoor mass gathering or allow an outdoor mass gathering to be held in Washington County unless a permit to hold such outdoor mass gathering has been issued as provided in this chapter... "Outdoor mass gathering" means an actual or reasonably anticipated assembly of more than three thousand persons which continues or can rea...

Full ordinance details →Official source ↗

Parade Permits

Washington County requires a permit for any 'outdoor mass gathering', an assembly of more than 3,000 people lasting 24 to 120 hours in open space, under WCC § 8.52.020(A). The Department of Health and Human Services reviews applications filed at least 140 days ahead, in unincorporated Washington County.

Washington County Mass Gathering Permits

Significant Restrictions

Washington County Code §§ 8.52.010(I), 8.52.020(A)

I."Outdoor mass gathering" means an actual or reasonably anticipated assembly of more than three thousand persons which continues or can reasonably be expected to continue for more than twenty-four consecutive hours but less than one hundred and twenty hours within any three month period and which is held primarily in open spaces, including parks, and not in any permanent structure. ... A.No or...

Full ordinance details →Official source ↗

Special Events & Permits by City in Washington County

2 cities in Washington County have their own special events & permits rules. Each link goes to that city's dedicated page with code citations.

HillsboroPop. 106,447

4 verified rules • Parade Permits, Park Event Permits

BeavertonPop. 97,494

5 verified rules • Block Party Permits, Parade Permits

All Washington County ordinances

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